Scrapping Propane Tanks (long story)

TimWafer

Member
Sorry for the long story here.

Where I work, we sell propane. Therefore we end up with a lot of old propane tanks which I have always added to my scrap metal loads. I came up with a system to remove the valves and break the tank down into 3 components for scrap. The steel tank, the brass valve and the aluminum handle. When set up for a batch it takes me an average of 3 minutes to break a tank down. The valve has always been the most valuable part and is currently over twice as valuable as the tank itself. This has worked well for years.

Monday I took in a load of scrap and had about 35-40 tanks thrown in it. The man at the scale comes out and informs me that they can no longer accept propane tanks unless they are physically cut in half. We discussed this at length but he said that the word came down from headquarters that because they had 8 different explosions due to propane tanks at there shredder plant that they cant accept tanks unless cut in half even if the valves are removed. I was told I could dump my load but would have to sort out all the tanks and take them back with me. So that s what I reluctantly started to do. While sorting out the tanks the loader driver at the scrap pile stopped and got out of his cab and asked me what I was doing. I told him and he said that was crazy and they were fine as long as the valves were removed. He said to leave them and he would shove them into the pile and it was then out of my hands as I wouldn t be allowed to touch them. This suited me so its what I did.

Upon returning to the scale, the attendant was upset that I didn t retrieve the tanks so I told him the whole story and that they would have to work it out among themselves as I was out of picture at this point . He agreed .

So I made out fine this time but my concern is with the next load of tanks. Im trying to think if there is a way to easily, safely and quickly cut a tank in two to satisfy them. I mean I have cut tanks up in the past for various uses but always spent a lot of time purging the tank first using various means. None of those means would be practical just doing it for scrap.

Looking for some innovative way to do this that would be practical. I have lots of tools at my disposal. Any suggestions?
 
Wood splitter with a tall V-wedge on the cylinder side and a tall staraight blade wedge on the
stationary side.
 
found 2 tanks in a cornfield that had been modified for stealing anhydrous to make meth. I called the cops and they never came so I shot a hole in them,one was full and I killed the grass around it, and sold them as scrap.
 
I would fill it to within 2 inches of the top with water, then use a hand held 120v plasma torch to cut a 6 nch circle circle out of the top. It is then
open enough to not explode even if it does burn. Empty the water, and continue the cut in half. 5 cents worth of electricity and air. (you needed the
torch anyway) Jim
 
When I worked for the trash company we
used to do the same remove valve and
scrap it then our scrapyard said that
they had to have a large hole or cut
in half. Reason being in the pile
couldn't tell if one still had a valve
easily. So we find this guy who had a
business disposing of tanks and would
come take them. I asked him one time
how he did it. He explained that he
takes the valve out and then leaves
them upside down for a few weeks, he
then has a steel plate that stands
vertical and he reaches around from
behind the plate and cuts a hole in it
with a torch. I couldn't believe how
dangerous this sounded but he assured
me only once in a while do they make
much of a woof or shoot a few ft away
like a small rocket....I won't be
trying that method nor would I
recommend it but he did hundreds of
tanks a year just from us and have was
still alive!
 
(quoted from post at 08:46:43 11/27/19) Wood splitter with a tall V-wedge on the cylinder side and a tall staraight blade wedge on the
stationary side.

I like this idea. Once valve is removed, flatten tank like a soda can using hydraulics. It can't explode iffn it's flat. :wink:
 
I'm kinda liking the idea of squashing them flat too. Sounds like it might even be fun. I have some 1-1/2" plate i could use for top & bottom plates for a press. Might be handy for smashing other things as well. Wonder how big of a hydraulic cylinder it would take to squash a propane tank flat?
 
The yard in town has a piercing spike that is made of something that doesn't spark.It was very expensive,but it seems to work.All the tanks that come in get opened,and when the
pile gets big enough they go out,pick the spike up with the little excavator,and poke holes in the tanks.It leaves an opening like a maltese cross.This morning light iron went to
two cents a pound,so you might be getting 20 cents for a scrap tank.I get a couple of dozen a year from various places,I give them away for free.The race car boys say they make
great air tanks.
 
Are these DOT or ASME tanks that are being scrapped? The only reason I know of to scrap a ASME tank is if it loses its id tag.
 
Please send them to Texas! We can't get enough of them to convert into BBQ pits. 300 gallon 500 gallon or even 1k gallon for the
guys with the big rigs.
cvphoto42957.jpg
 
(quoted from post at 12:54:42 11/27/19) Please send them to Texas! We can't get enough of them to convert into BBQ pits. 300 gallon 500 gallon or even 1k gallon for the
guys with the big rigs.
<img src="https://www.yesterdaystractors.com/cvphotos/cvphoto42957.jpg">
always have brush piles to burn, so I just open tank/remove valve and put them beside or on edge of brush pile. After cooled, safe to take torch/welder to them. Much safer the the "fill with water & cut", all those need is 1 cu inch of no water & it can still explode. seen it happen when OP thought completely full!!
 
At the current scrap value, no way to invest any time in disposing of them.

If you strip the valuables, disable the ability to be used for propane, could they be sold or given away?

Around here they are always wanted for BBQ smokers.
 
I have used a couple of fork truck propane tanks for replacement air compressor tanks, about 10 gallons, work great! The guy at the propane company told me to take all the fittings out, stand it upside down for a week, and they're safe, as propane is heavier than air, it purges right out. I welded on both of them with no problems, I did leave the holes open until I was all done welding.
cvphoto42959.jpg
 
I should clarify that the vast majority of these are just 20lb tanks like used on a lp grill. A few are bigger.
 
I burn them out with a brush/tree pile them cut them apart. Fire chief came to inspect the pile one day and asked about the tanks,(I usually have 300 gallon fuel barrels), he wanted me to just haul them in. I said fine you cut a 1 foot hole in them and I will gladly haul them in, he said light the pile!!
 
You'll have twice as much in the cost of cutting (electricity and cutting wheels - let alone time) as you'll ever get in scrap.
 
This might be true but what else can i do with them. Eventually we would be buried in them if I cant get rid of them. People constantly drop them off here.
 
Oh boy! This is what I need right here.
https://youtu.be/znIBQsqafec
I will have to look into building something like this. I probably can fab up everything but the cylinder.
 
The small size is what I used to make a little wood burner cook stove, heater. They are sort of popular about now in Wisconsin for the ice fisher huts, deer cabins, large
tents, some of old converted camp trailers used off grid. Menards and Harbor freight had kits to make them into airtanks, a T fitting and two tanks on small compressor
gave enough capacity to use spray gun that could still be picked up. DIY project to keep out of bars when retired. RN
 
I have a neighbor who has about 150 of them at all times--he cuts both ends off an depending on the length he cuts the middles out. He takes them to a large outdoor store here in Michigan and they are sold as fire pit rings--he can't keep up and the coin is very good indeed.............
 
I would think a wood splitter would safely cut them open, but I would take all the fittings out and stand them upside down for a week first. I could use another tank, to made a bead-cheater out of! I found one once that the druggies were using for anhydrous, and I tried filling it with water and letting it freeze, I thought it would burst open, but it didn't, so I scrapped it as is. That was before I had seen how good a bead-cheater worked, I should of kept it.
 
Local LP company fill them with water and lets them freeze and bust open. Not sure if they leave the valves in or not. Chris
 
(quoted from post at 13:15:25 11/27/19) This might be true but what else can i do with them. Eventually we would be buried in them if I cant get rid of them. People constantly drop them off here.

Can t they be recertified and continue to be used? I have gotten several lp tanks that have a second date stamped on them below the initial date.
 
A guy at our shop uses things like that to make yard ornaments to sell at flee markets. Made some into robots and others into those little yellow minions from the movies.
 
Never seen one with aluminum handle.
True they are not aluminum but some kind of pot metal but they always throw them in their clean aluminum bin at the yard. Their call not mine.
 
Can t they be recertified and continue to be used? I have gotten several lp tanks that have a second date stamped on them below the initial date.[/quote]

A lot of them could but a lot are in bad shape. We don't re-certify ourselves but do give some to a dealer who does. We are in a relatively small town but its amazing how many people just want to get rid of old tanks. A lot of them are even full tanks. Most of them contain at least some propane. None of us ever have to actually buy propane for our own use. We just use tanks customers want to get rid of. They just keep coming.
 

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